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This app will give you a 16 tone DTMF keypad and the ability to generate custom DTMF sequences, and set the duration and tone to silence ratio. Includes the characters 1234567890*# and the menu tones ABCD. You may enter a custom sequence via the keypad, soft keyboard, or speech if your device already has speech-to-text capability. This is basically a touch tone telephone keypad, which may be of interest to amateur ham radio repeater operators

30 Watt 50 MHz ham radio beacon de N6CA

Conductor is a training tracking software that can organize any type of education, training, certification or license. It generates a multitude of reports perfect for regualtory bodies, free demo.

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Live feed for NHP rural areas of Moapa Laughlin Primm Alamo Indian Springs

In this article the author provides some guidelines on how to solve a common problem when stacking different types of yagi antennas on the same mast, limiting the effects on gain and radiation pattern of both antennas

Distributors of specialty metals, electricial wire & cable, and high capacity magnet mounts for government and business. Stainless steel bars and rods for nuclear applications.

Chesterfield Islands DXpedition 2000

A 13 CM signal source project by W6PQL

Article explaining electronic network of low pass filters

Study of the Coaxial Dipole: Just how does this thing work.

TSC International produces soft magnetic sheet steel, custom-stamped and heat-treated to achieve optimal electrical characteristics for applications such as motors, generators, linear power supplies, and ballasts. The company's manufacturing process focuses on precise material engineering to meet specific performance requirements in various electrical systems. They also specialize in soft magnetic core materials essential for transformers, chokes, and inductors. These core materials are utilized in power supplies, lighting ballasts, signal conditioning circuits, inverters, and battery chargers, providing critical magnetic properties for efficient energy conversion and signal integrity. Located at 39105 Magnetics Blvd, Wadsworth, IL 60083-0399, TSC International provides contact via sales@tscinternational.com or phone at +1 (0) 847 249 4900, facilitating direct inquiries regarding their magnetic component offerings.

Clevaflex is a manufacturer of flexible wound tubing that can be used in a variety of applications. our unique manufacturing process allows tubes to be designed and built with a multi-ply convoluted wall contour that creates a permanently bonded tube.

YAESU FT-1000MP Mark V ESSB Modifications pdf file

This page is to provide links to resources and information regarding technologies to reduce computer interference

RigPix Database: Kenwood TS-50, pic and specifications, link to user manual

Ham Radio Antenna parts and kits manufacturer, based in Germany

Tri-Cities Frequencies, Live Scanners, CTCSS information and more

An off-center-fed sleeve dipole, made of CPVC and aluminum foil tape by KV5R

Provides technology and solutions for the electronic test and measurement, optical, rf and microwave, wireless, wired, telecommunications. Make Frequency Counters, Antenna and spectrum analyzers, power meters, signal generators

The NB6Zep Antenna, an electrically shortened 80-meter end-fed wire, addresses space constraints for low-band operation by integrating two loading coils into a 37-foot wire. This design, modeled with _EZNEC_, explores configurations like the quarter-wave sloper and inverted-L, with the latter providing a more vertical radiation pattern and practical backyard deployment. The resource details specific coil construction, recommending 21 uH coils made from _BW coil stock #3026_ or similar, and outlines wire segment lengths for optimal tuning. Performance analysis indicates a radiating efficiency of approximately 27% with good ground conductivity, resulting in a signal typically 3-4 dB down compared to a full-size quarter-wave vertical. The antenna exhibits a narrow bandwidth, around 50 kHz, due to its high Q, necessitating a tuner for broader band operation. Feedpoint impedance is low, with ground resistance playing a critical role in achieving a usable SWR. The article emphasizes the importance of an effective ground rod at the feedpoint for proper operation and tuning, suggesting an antenna analyzer for precise adjustments. It confirms the antenna's suitability for DX, citing successful contacts from Oregon to the East Coast and Hawaii on a 160-meter variant, making it a viable option for urban operators seeking low-angle radiation on 80 meters.

This is a concept paper, not a constuction article. There are too many variables to propose a one size fits all design. However, this paper should give you the basic idea how to do it

Kenwood TS 480 english manual in pdf format

A multiband HF Vee Beam antenna at VK5SW. If you're lucky enough to have the room, perhaps you may like to put up a multiband Vee Beam antenna for the HF bands.

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The goal of detuning is not to avoid resonance, but rather to minimize re-radiation and/or current in the interfering structure.

W4TI Rotator Installation

Six elements yagi antenna for 6 meters band. This antenna design is based on the QuickYagi 4 software by WA7RAI, uses a 6.5 m boom, feature 12.0 dBi gain and 35dB front/back

St. Louis Repeater runs four repeaters in the St. Louis Metro Area, including two with autopatch capability.

NORAD Two-Line Element Sets, FAQ, and related informations.

City of Milwaukee Fire Department Live Audio Feed

PACTOR mode radio modems and accessories, performance sailing electronics and innovative hard to find parts. Audio cables, packet cables, usb to serial converters

On this page are designs for Dual Band 2M / 70cm antennas. All antennas are 50 ohm designed driver. These Yagis have a unique element called a Open Sleeve. 4 Element 5 element and 9 element Dual Band - 2M / 70cm antenna projects

Modifications for the ICOM IC 7300 transceiver, MARS mod, antenna tuner coverage expansion, Mic Modification

A 30 Meter Quarter Wave DIY Ground Plane Antenna that loads up nicely also on 12 and 6 meters

Lightning protection for electronic equipment

A complete guide to undestand and know how electret condensor microphone elements works by K3DAV

Live audio of the National Hurricane Center’s Skywarn Nets. This live feed covers several different states, and locations throughout the US including: TX, LA, MS, AL, FL, GA, SC, NC, VA, MD, DE, PA, NJ, NY, CT, RI, MA, VT, and ME

Experimentig magnetic loop antennas for VHF and HF by M0UKD

Constructing an effective directional antenna for the 40-meter band presents unique challenges due to its physical size requirements. This resource details the homebrew construction of a 2-element _Moxon_ Yagi antenna specifically designed for 7 MHz operation. The author, TA7OM, provides a visual guide to building this antenna, showcasing the boom, element mounting, and feedpoint connections through a series of high-resolution photographs. While textual descriptions are minimal, the imagery clearly illustrates the mechanical aspects of the antenna's assembly. The _Moxon_ rectangle design offers a compact footprint compared to a full-size Yagi, making it a practical choice for many hams with limited real estate. The visual documentation allows builders to replicate the antenna's structure, including the use of PVC pipe for element support and the method for spacing the driven and reflector elements. The project emphasizes practical construction techniques for achieving a directional pattern on a challenging HF band, suitable for DXing and contesting.

G3SEK answers to some practical questions on builing the N2PK VNA Vector Network Analyser

Memphis Police and Shelby County Sheriff dispatch

The Tuna Tin 2 is a simple transmitter originally designed by the legendary author and experimenter Doug DeMaw, W1FB. The TT2 was first published in the May 1976 issue of QST.

The function of the XPhase is based on the fact that the interfering signal, received by an auxiliary antenna, is added phase-shifted to the signal received from the main antenna. When the phase-shift is more or less 180°, the interfering signal is canceled out.

Windows shareware contest log program for the CQ WW DX contest. The contest log software offers a Network version capable to run over a local area network in order to allow several pc to update a single shared contest log file. Windows XP through Windows 10.

Restoration of Viking Valiant, Hammarlund SP-600 and Heathkit HX-10 Marauder by KG9OM and KJ4W

Custom QSL Cards, Full Color Custom QSL Cards, Offset Printing

Joe Carr's Radio Tech-Notes Installing Coaxial Connectors

K6FRC/B 6 m beacons website